groebl



(No Model.)

H. WGROEBL. ADJUSTABLE DESK AND SEAT.

Pat'ented Aug. 5, 1884.

INVENTGB: BY ATTORNEYS.

WITNESSES u. MYERS Phowlflhcgnphur. Washington. 0. a

iINITEqD STATES- PATENT trier;

HERMAN WILLIAM GBOEBL, OFVINCENNES, INDIANA, ASSIGNOR TO HIM- SELF, JACOB \VEISSENBAOH, EMIL GRILL, AND FREDERICK MILLER, ALL

OF SAME PLACE.

ADJUSTABLE DESK AND SEAT.

SPECIFICATION forming part of Letters Patent No. 803,002, dated August 5, 1884:.

Application filed August 11, 1823. (No mode To call whom it away concern: 1

Be it known that I, HWVILLIAM GRnBL,of Vincennes, in the county of Knox and State of Indiana, have invented a new and Improved Adjustable Desk and Seat, of which the following is a full, clear, and exact description.

My invention relates to improvements in adjustable desks and seats; and it consists in the peculiar construction and arrangement of the parts, as hereinafter more fully set forth,

and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar, letters of reference indicate cor- I 5 responding parts in all the figures.

I Figure 1 is a side View of my improved adjustable desk and seat. Fig. 2 is a sectional plan view of the same, taken on the line a; m, Fig. 1. Fig. 3 is an enlarged cross-sectional view on the line 3 3 Fig. 2. Fig. 4. is an enlarged longitudinal sectional view of the seat joint. Fig. 5 is a cross-sectional" elevation of the same.

Standards A, having a U-shaped cross'sec- 2 5 tion, are secured to bases A, and on one flange of each standard A the grooved legs B of the desk C are held to slide vertically. A rack, D, projects downward from the bottom of the desk and engages with a pinion, F, mounted on the shaft F, journaled in the bar 0, and having a hand-wheel, G,wit-h which a locking-lever, H, engages, whereby the desk can be raised or lowered by turning the hand-wheel.

The desk G is provided with apocket, C,on its under side,which pocket is open at the side,

and is adapted to receive books, slates, 850.. The standards J of the seat-back K are providedwith half-dovetails J, which act as clamps and pass into corresponding half dovetail o grooves in the rear sides of the slats K, and screws a are also passed through the standards J into the rear surfaces of the slats K. The standards J are provided at the bottom and at about half their height with backwardly-pro 5 jecting arms L L, 'ofwhich the lower arms, L, are united by a bar, M. At the ends of the arms L L hook-blocks N are formed, which embrace the flanges of the standards A, and are adapted to slide vertically on the said standards. A standard,0, secured to a cross- 0 bar, P, uniting the bases A, has a rack,Q, provided-with upwardly-projectingteeth counter sunk in that side facing the seat-back K. In

a recess, M, in the rear surface of the bar M a latch-lever, R, is pivoted, the lower end of which is pressed against the teeth of the rack Q by a spring, S, the upper handle end of the latch projecting above the bar M. Check-studs T,'against which the bar M can strike, project from the standards 0 at the top and bottom of. the rack Q. The front ends of the lower arm,

L, project beyond the front surface of the seat back, and to the said ends of the arms L the arms U, on which the seat 'V is secured, are pivoted by bolts 11. The arms L and U are provided with ch closhoulders d on the upper edges,which chec shoulders come in contact when the seat is raised or swung upward, and prevent the outer edges of the seat from coming in contact with the seat-back. The pivoted ends of the arms L and U are rabbeted, as shown in Fig. 5, and between the rabbeted joint parts a concave steel spring-washer, g, is held for the purpose of holding the seat in position at any inclination, and to prevent rattling of the joints.

The desk can be adjusted higher orlower by turning the hand-wheel G, and is locked inposition automatically by the lever H. If the seat is drawnupward,thelowerend ofthelatch 8o lever B slides over the teeth of the rack Q, and if the seat'is released it is locked in position automatically by the latch R. If the seat is to be lowered, the upper end of the latch R must be pressed toward the standard 0 to dis- 8 5 engage the lower end fronithe teeth of the rack. The seat can thus be adjusted independently of the desk, and the desk can be adjusted vertically independently of the seat.

School-seats, schooldesks, oiiicedesks, or 0 any other kinds of desks can be constructed in the manner herein described.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination,with the flanged stand- 5 ards A, secured to the bases A, recessed standard O, and grooved legs 13, of the desk 0, each leg being adapted to slide on one of theflanges of the standards A, of the rack D, projecting downwardly from the desk, pinion F, shaft F,

journaled in the standard 0, hand-wheel G, and

spring-pressed locking-lever H, all construct- 5 ed and operated as set forth.

2. The combination, with the seat-back J, having arms L L, and recessed bar M, uniting the arms L, of the bases A, flanged standards A, hooked blocks N, standard 0, provided with IO the rack Q, check-studs T, latch R, and spring S, substantially as shown and described.

3. I11 a combined desk and seat, the combination, with the standards A and O,of the desk 0, the seat-back K, the seat V, the arms L L I 5 of the seat-back, the bar M, uniting the arms HERMAN WILLIAM GROEBL.

Witnesses:

J AOOB WEIssENBAcH, BERNARD WoLTER. 

